EXHIBIT 15

                    UNAUDITED INTERIM FINANCIAL INFORMATION LETTER



                                                                      EXHIBIT 15




Securities and Exchange Commission
450 Fifth Street N.W.
Washington, D.C.  20549


We are aware that our report dated April 23, 1998 on our reviews of interim
condensed consolidated financial information of Digi International Inc. and
Subsidiaries (the Company) for the three month periods ended March 31, 1998 and
1997, and included in the Company's Form 10-Q for the quarter ended March 31,
1998, is incorporated by reference in the Company's registration statements on
Form S-8 (Registration Nos. 33-32956, 33-38898, 333-99, and 333-1821) and Form
S-3 (Registration No. 33-59223).  Pursuant to Rule 436(c), under the Securities
Act of 1933, this report should not be considered a part of the registration
statements prepared or certified by us within the meaning of Sections 7 and 11
of that Act.



                                                  COOPERS & LYBRAND L.L.P.

Minneapolis, Minnesota
April 30, 1998